EF0042B Features High fidelity and full frequency Stereo sound Digital PLl Equipped with present frequency point saving function when power failure Supports Micro USB 5V charging Can be charged via cigarette lighter 5V port or cell phone charger Applies to all 3.5 mm port audio playback device interface With speakerphone function General Specs Model LH-100 Type FM car transmitter Frequency Range 88.1 - 108 MMHz Sound Stereo sound Screen LCD blue backlit screen  Compatibility Applies to all 3.5 mm port audio playback device interface  Battery Built-in lithium battery Working Time  Over 4H Frequency Response 20HZ - 20KHZ Separation  60 DB SNR  60 DB Interface  3.5 mm Package Details Weight: 53.50 g Size: 12.8*8.00*2.0 cm Package Includes * FM Car Transmitter